ITPEC FE Morning October 2023 Question 45
Which of the following is a description concerning a decision table that is one of the design techniques used in system development?
Explanation
A combination of conditions and the corresponding operations — that is exactly what a decision table lays out.
A decision table has four parts: the condition stub (the conditions to test), the condition entries (Y/N for each rule), the action stub (the possible operations) and the action entries (X marks which operations each rule performs). Each column is one rule, a combination of condition values and the actions it triggers. It helps make complex branching logic complete and consistent.
Answer (a)
Why not others:
- •(b) — rectangles for entities joined by relationship lines describe an E-R diagram
- •(c) — control flow of processes and selections drawn with lines or arrows describes a flowchart
- •(d) — data flowing between external entities, processes and data stores describes a DFD
Key rule: Identify a design notation by what it models: conditions to actions (decision table), data (E-R diagram), control (flowchart), data movement (DFD).
System Development Technology · AI-written, may contain errors
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